Electric ingot-extractor.



No. 862,371. PATENTED AUG. 6, 1907.

H. AIKEN.

ELECTRIC INGOT- EXTRA'GTOR.

APPLICATION I' ILED APR.27,1904.

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No. 862,371. PATENTED AUG. 6, 19-07. H. AIKEN. ELECTRIC INGOT BXTRAG'IOR,

APPLICATION FILED APR.27,1904.

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No. 862,371. PATENTED AUG. 6, 1907.

AIKEN.

EIHEICTRIG INGOI' BXTRAGTOR.

APPLICATION FILED APR.27,1904.

4 SHBETSSHEET 3.

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' No. 862,371. PATENTED AUG. 6, 1907.

H. AIKEN.

ELECTRIC INGOT BXTRAGTOR.

APPLICATION FILED 1 .1R.'4"I,1904.

4 SHEETS-SHEET 4.

WITNESSES INVENTOR 1n! nnRRls PEYERS co., WASHINGTON, 0.1:,

HENRY AIKEN, OF PITTSBURG, PENNSYLVANIA.

ELECTRIC INGOT-EXTRAOTOR.

Specification of Letters Patent.

Patented Aug. 6, 1907.

Application filed April 2'7, 1904. Serial No. 205,230.

To all whom it may concern:

Be it known that I, HENRY AIKEN, of Pittsburg, Allegheny county, Pennsylvania, have invented a new and useful Electric Ingot-Extractor, of which the following is a full, clear, and exact description,

reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a side elevation of my improved extractor; Fig. 2 is a vertical cross-section of the same showing the jaws open; Fig. 3 is a vertical section at right angles to Fig. 2, showing parts in operative position; Fig. 4 is a sectional side elevation; Figs. 5 and .6 are detail views hereinafter referred to, and Fig. 7 is a top plan view of the apparatus.

My invention relates to ingot extractors of the vertical type, and is designed to do away with hydraulic or other power cylinders on the trolley and to accomplish the necessary movements by mechanical connections from drums on the trolley, such drums being practically driven by electric motors.

In the drawing, in which I have shown a duplex extractor arranged to strip two molds side by side, 2 represents the trolley supporting the mechanism and arranged to be moved along its track by electric motor 3. On the trolley are mounted the duplex winding drums 4, 4, each having winding chains 5 and 6 arranged in pairs at each end thereof, said chains winding from opposite sides, and the lower ends being secured to the suspended cross-head 7. The arrangement of the chains in pairs keeps the cross-head in a perfectly horizontal position during the raising and lowering of the same, and affords all the advantages of a rack device.

In the cross head are secured nuts 8, 8, which engage right-hand screw-threads on screw-threaded sleeves 9, 9, having square holes extending through them. These sleeves are also provided with left-hand screw-threads 10, 10 which engage corresponding nuts 11 in a lower cross-head 12 secured to the upper end of the outer hollow shaft or sleeve 13. The use of the right and left-hand screw-threads does away with the use of guides to prevent rotation of the not or screw. These screw-threads react one against the other and consequently there need be'no sliding guides to hold the nut from rotation. The jaws 14 of the stripper are pivoted to the lower end of the sleeve 13, and to their shafts are secured levers 15, having link connections 16 with brackets 17 upon a short sliding ring 18, which in the position of Fig. 2 rests upon the nose 19 of the stop which rests upon the ingot. This nose is secured to the lower end of an inner hollow shaft 20, which extends through the ring 18 and through the cross-head 12, its upper end being secured to the cross-head 7.

Two squared shafts 21 extend downwardly through the sleeves 9, their lower ends being made cylindrical and resting in bearings 22 in the casing 23 which surrounds the depending mechanism. The upper ends of these shafts are made cylindrical and are carried in bearings 24 upon the trolley. Bevel wheels 25 are secured to their upper ends, these bevel wheels being engaged by bevel pinions 26 on shaft 27, having a toothed wheel 28 driven by a pinion 29 on the shaft of the electric motor 30.

In order to reduce the work of the motors and counterweight the depending parts, 1 preferably provide chains 31. which extend from compensating link 32 secured to cross-head 7, up over the central portion of the barrel 4, their other ends being provided with counterweights 33.

To drive the barrels or drums 1 provide the two motors 34, having wheels 35 inter-meshing with wheels 36 on counter-shaft 37, the counter-shafts having pinions 38 intermeshing with toothed wheels 39 on the drum shafts.

In using the apparatus, the parts being elevated, the trolley is moved to the desired point over the car, the barrels are then rotated in the proper direction for lowering the extractors. During this downward motion, the cross-heads slide down over the squared shafts. As the inner stop strikes the ingot, the grips 14 are swung out and the parts take the position shown in Fig. 2. Now, on starting the motor 30 the squared shafts are rotated in the proper direction to lift the outer tubular shaft 13. As this is lifted the jaws swing in until they engage under the lugs on the ingot mold in the usual manner. ues a vertical lifting strain is brought upon the mold lugs, the power being large on account of the screw action. This screw action is continued until the mold is started off the ingot, when the motor 30 is stopped and the drum motor 34 thrown in, thus lifting the entire extractor.

The advantages of my invention result from doing away with hydraulic or other power cylinders, the stripping being obtained by mechanical action. The use of fluid connections to the trolley is thus obviated, and all of the movements are obtained through the use of ordinary electric motors on the crane. The slow screw movement gives enormous power for stripping, while the stripper may be immediately lifted at a faster speed as soon as the mold is started off the ingot." The mechanism is comparatively simple, eas ily operated and not liable to get out of order.

Many variations may be made in the form and arrangement of the stripper and the actuating mechanism without departing from my invention.

1 claim:

1. An ingot extractor having a suspended upper cross head, nuts secured in said cross head, a lower cross-head, oppositely threaded nuts in the lower ci'osshead, oppo As this screw motion continsitely threaded hollow screw-shafts engaging said nuts and connecting the cross-heads, squared shafts passing through the nuts and screw-shafts, gearing for actuating said squared shafts, a hollow shaft connected to the lower cross-head and havingjaws connected thereto, an inner stop shaft connected to the upper cross-head, and passing through the hollow shaft, and mechanism actuated by the vertical movement of the hollow shaft for opening and closing the jaws; substantially as described.

2. An ingot extractor'having depending outer support carrying jaws, a crosshead for said support with nuts having actuatingscrews for raising and lowering the support, driving shafts for actuating the nut and screw-mechauism, means for moving the cross-head'in a vertical di rection on the actuating shafts, a stop shaft passing through said support, and a sliding member on the stop shaft connected with the grasping jaws; substantially as described. r

3, In an ingot stripper, a movable trolley, an upper cross head suspended from the trolley and connected to winding mechanism thereon, said cross head having a depending ingot stop or plunger, and a lower cross head guided by said stop or plunger and having a mold engaging device connected thereto, said cross heads having each a pair of nuts therein upon opposite sides of the ingot stop or plunger, two right and left hand screws connecting said cross-heads and engaging the nuts thereof, and means for actuating said screws; substantially as described.

4, In an ingot stripper, a pair of cross heads, an ingot stop carried by the upper cross head, and passing through the lower cross head, a mold engaging device carried by the lower cross head, two right and left hand screws connecting the cross heads, one screw being at each side of the ingot stop, means for actuating the said screws, and hoisting mechanism from which the upper cross'head is sus pended; substantially as described.

In an ingot stripper, a pair of cross heads, an ingot stop carried by the upper cross head, a mold engaging device carried by the lower cross head, means for imparting pressure in opposite direetionstosaid cross heads, a movable trolley having a winding drum, a winding chain on each end portion of said drum, said chains being connected to opposite sides of the upper crosshead, and a counterweighted chain connected .to the central portion of the cross head and passing over the central portion of the winding drum; substantially as described.

In testimony whereof, I have hereunto set my hand.

HENRY AIKEN.

Witnesses C. I. BYRNES, H. M. CORWIN. 

